tag:digital.library.illinois.edu,2005:/items/9dde66f0-994e-0134-2096-0050569601ca-2Missouri-Illinois, Altenburg quadrangle2022-09-15T18:31:47Ztag:digital.library.illinois.edu,2005:Item/699162016-11-30T19:19:17Z2022-09-15T18:31:47ZMissouri-Illinois, Altenburg quadrangleControl in part by Mississippi River Commission.University of Illinois at Urbana-Champaign Library